78 REPTILES. 



g. Species allied to T. leberis. 



19. Tropidonotus leberis. 



Coluber leberis, Linn. Syst. Nat. ed. x. t. i. p. 216 ; Shaw, 

 Gen. Zool. iii. p. 433 ; Daud. Rept. vi. p. 218. Vipera leberis, 

 Latr. Rept. iv. p. 8. Coluber septemvittatus. Say, Journ. Acad. 

 Nat. Sc. Philad. iv. p. 240 ; Harlan, Med. and Phys. Res. p. 118. 

 Tropidonotus leberis, Holbr. N. Amer. Herpet. iv. pi. 13 ; Dekay, 

 New York Fauna, Rept. pi. 11. f. 23. Regina leberis, Baird ^ 

 Girard, Catal. p. 45 ; Dum. Sf Bibr. vii, p. 579. 



Scales in nineteen rows ; upper labials seven, the third and 

 fourth touching the eye ; anterior oculars two, posterior two. 

 Above dusky olive-brown, with a lateral yellow band, and three 

 dorsal black lines ; abdomen pale yellow with four dusky lines. 



a. Adult : bleached. North America. Old Collection. 



b. Young. North America. Presented by Dr. Jacob Green. 



c. Adult. North America. From Mr. Cuming's Collection. 



d. Half-grown. North America. Presented by the College of 



Surgeons. 



20. Tropidonotus grahamii. 



Regina grahamii, Baird ^ Girard, Catal. p. 47. 



Scales in nineteen rows, strongly keeled ; upper labials eight, 

 the third and fourth touching the eye ; anterior oculars two, 

 posterior two. Head small, narrow, indistinct. Above brown, 

 a broad yellow, black-edged lateral band, occupying the three 

 outer rows of scales ; belly uniform yellow in the adult. 



a. Adult. North America. From Mr. Mather's Collection. 



b. Young. Western Mexico. From the Haslar Collection.— 



Along the middle of the belly a blackish band. 



c. Young : head injured. New Orleans. From Mr. Cuming's 



Collection. — Like the former. 



d. Half-grown. North America. — Middle of belly black. 



21. Tropidonotus medusa. 



Scales in twenty-one rows ; upper labials eight, the fourth and 

 fifth touching the eye ; anterior ocular one, posterior two. Above 

 dusky olive-brown, with five yellow bands, the lateral including 

 the edge of abdomen ; the remainder of each ventral plate black, 

 in the centre with a regular yellow triangle, forming together a 

 longitudinal band in the middle of belly. 



a. Adult. Texas. From Mr. Brandt's Collection. 



b. Young. North America, 



